Combined ink drying and neutralizing device



March 7, 1933.

c. H. cocHRANE COMBINED INK DRYING AND NEUTRALIZING DEVICE Filed Nov. 26, 1930 Patented Mar.` 7, 1933 PATENTg ol-Flcrfz/l CHARLES :HENRY 'cocHaANn or NEW Yom; N. Y.

COMBINED INK DRYING 'AND NEUTRAIIIZING DEVICE vApplication filed November 26, 1930. Serial No. 498,399.

p My invention relates to improvements in devices for electrically drying ink on printed paper sheets and at the same time remove or neutralize static electric charges in the pa per sheets,y as experienced in the operation 'of printingpresses and paper handling machines. f l

The objects of this invention are as follows: Frst.-To provide a simple and efficient f devicefproducing strong electrical breezes in close proximity of'freshly printed paper, .for the purpose of rapidly oxidizing the inl: and thereby greatly facilitating the drying process.

Seconc--To utilizefthe same device to dissipate .or neutralize any static electric charge that may. be present or develop 1n the paper. T1,'7Z.-To provide a large number of specially designed electrical kbreeze-produc- 0 ing members of comparatively small individual electrical capacity.

F0w'th.-To provide a simple and effective protecting and insulating means to positively prevent the electrically charged breeze-producing members from beingtouched or'tampered with.

Fifth-To provide suitably interwoven insulating and spacing means for the purpose of preventingany possible displacement ofthe individual electrical breeze-producing members.

Simtel-To provide certain lmounting means whereby the device may be easily attached or detachedto or from any standard printing or paper-handling machine.

yiSevemfla-JIO produce 'a device of simple and inexpensive construction, to permit the manufacture of the same in large quantities and at the possible lowest cost.

40 i These and other objects I attain by the n novel combination of various parts and elements, fully described in this specification andA illustrated inthe accompanying drawin hich: 4513i- W igure l represents afront elevation and diagram of the electrical connections of a combined electricalfdrying and neutralizing device embodying fthe features of my invention.

l Figures 2,3 and 4, represent detailed views gf various electrical breeze-producing memers. f

Figures 5, 6 and 7, represent detailed views of the general construction.

. Itis a well known factthat in the operation of modern high speed printing presses and paper-handling machines numerous serious difficulties must be overcome. By far the most important difficulties are: first, the comparatively slow drying process of the printed ink, second, the high degree of static electricity developed in the paper. The methods commonly employed to overcome these disadvantages, are gasy or electrically operated heating devices, for the drying process, and the so-called neutralizer, another electrical V device to dissipate the electrical charges accumulated in the paper.

In practice I have found that the ink drying devices, 'employed at present, develop a 7o very high degree of temperature, thusnot only rendering the device difficult to apply and operate, but are an ever-present source of danger, being near to the highly inflammable paper materials.

The so-called neutralizers, at present utilized to dissipate the static electrical charges, are designed to produce a concentrated alternating electrical field of high potential and highncapacity require the utmost care to pros0 vide adequate protection against accidental touch and contact. y n

Now, I discovered that by reducing the individual electrical capacity and considerably increasing the number of the electrical breezeproducing members I am able to create a widely diffused field of electrical chargesfmanitesting themselves in the form of electrical breezes. These electrical breezes not only n will effectively dissipate or neutralize the static electrical charges lbut also cause the printed ink to instantly oxidize, or in other words vform a slight film upon its surface, thuseliminating the dangerous method of drying by artificial heat." i

The'electrical breezes are created by the inductive action of a conductor charged with high voltage alternating energy upon a large number of properly arranged inductive members oflow electrical capacity.

lll

In Figure 1 I have illustrated a device embodying the features of such a combined inl;

drying and neutralizing arrangement actuated by electrical breezes. A source of low tension alternating current, providedv either directly from an alternating current light or poWer system, or indirectly by a motor` generatorvv arrangement A, as illustrated, is connected to a high tension transformer B, the secondary coil of which is designed to pro-` vide an electric current of highpotential usually 20,000 volts. Electricalconductor l, of the combined ink drying and neutralizing device, is charged with this high potential energy, which by induction is transferred tothe individual.members 3. Conductor .l is suitably covered by a heavy insulating Jacket 2 upon which a very large number ofthe in?y ductive breeze-producing members 3 yare permanently positioned and protected by a suitable insulating covering la. Another protective splitacketr ofinsulating material and a pair of suitably arranged mounting brackets 6, complete the-arrangement.

In Figures 2, 3 and l -mductive members of various design lare shown.y In v'Figure 2 the inductive member, made of metallic rod or Wire, comprises a loop 3a and the straightdif-` fusing part 3b. v I

It Will be noted that the Vloop part l3cr em- 7 braces ybut a small area Vofactive charging surface, thus reducing the Vindividual potential charge to a much lower value than hithr ertopracticed. In` Figure 3 the same ineinj ber as in Figure2 is shown-With the exception that .the charging capacity is doubled by providing twoloops 3a and 3a1, Figure 4 shows a means of insulating the individual members byA a. covering 7, of insulating material. `In v Figures 5, 6 and 7 a more detailedzillustration of the method of assemblingand insulating the prime conductonand -the `individual inductive-inembersof the,=device are shown.

' The inductive members are designed to closely grip and hold by. friction upon the` insulating covering 2. A sheet offinsulating material ab is suitably Woven between the alternating members 36,thereby effectively insulating and spacing. .the individual members. Another insulating covering 4a is folded over the inner structure as shown in Figures 6 and 7 ,thus fully enclosing and-,protecting the metallic Y members`3 from touch or injury. A slotted insulating aclet 5, serving as a-holding and protectivemeans vis finally attachedfor the purpose of holding the various membersl sel curely in position.y Y 1 Having thus fully described-andillustrated my invention I do not Wish to confine myself to Lthe exact details yof construction, litbeing apparent that there may vlie-considerable vari- Y ations possible VWithout departing *fromV theV spirit of my invention. i -IclaimiV Y ,v

Y k1. Ina deviceyofthe characterdescrbed ity of inductive electrical members.

2. In a device of thecharacter described 4 vthe combination ofan electrical conductor,

saidy electrical conductor` being subject to i charges'of highpotential alternating electrifcal energy, fan A insulating Ycovering embracingsaid conductor,'and.a plurality?ofsuit-r l' ably shaped inductive: metallic lmembers kof low electrical capacity positioned f and;held f in close proximity upon ksaid insulatingfcovering to serve the 4purpose:offproducings'a Vdilfused field of electrical breezes, andasuit.-

able interwoven insulatingl ineansitolateral-y Y f Vly yspace said plurality vof 1inductive metallic 90 completely encase and protectfsaidmetallic members, and folded z ,insulatingl means Ito inductive `members.

3. In. a deviceof thev character described the combination of an electrical conductor,

said conductor subject nto charges ofi-.high

potential alternatingelectrical energy; an insulating covering surrounding saidconduc-4 tor, anda plurality of metallic inductivemeinbers of loW electrical capacity positioned'and held by'means of a suitably interwoven'insulating member in close lateral' proximity upon said insulating covering,` andsaidinetallicinductive members comprising alooped charging portion terminating 2 into a straight electrical .diffusingA portion, andsaid Vlooped portion disposed to surround and gripssaid insulating. covering, Aand a a :folded insulating member to completely, enclose: andjprotect said metallic inductive membersjsubstantiali ly as and forV the purpose setfforth.

4. In a devicer of the character described vthe combination ofasuitable electrical:'-con-V lductor, ay suitable insulating covering een casing-'said conductor, :a plurality of. looped inductive chargingfmembers'suitably spaced and heldupon saidfinsulating covering". and a longitudinally and centrally positioned insulating strip -member threadedv between Vthe inductive charging members', and an insulatingy protecting cover; member to completely .encase said charging members,gandsai/disin-k `sulatingV cover memberl folded around "and over said charging members andheldzinfpo I' sition -by a longitudinally slottedinsulating 5. 'In combination Awith yprinting :presses andcpaperl handlinglmachines a `source .of high tension alternatingelectric`current,said :higlif vtension"- alternating current electrical@ Sleeve member Substantially as and. forth@ im ly connected to an insulated cable conductor positioned in close proximity of the moving paper, and said insulated cable carrying a plurality of inductive loopedfmetal ins for the purpose of producing inductive e ectrical breezes to rapidly dry the freshly printed ink and at the same time dissipate static electric charges in the issuing paper, said plurality of looped metal pins laterally spaced and held in position by interweaving a strip of insulating material, and a sheet of insulating material folded over and completely encasing said looped metal pins, substantially as and for the purpose set forth.

6.l In a device for neutralizing electrical charges in sheets of paper and simultaneously oxidizing freshly printed ink upon the paper, the combination of a highy tension transformer or other source of alternating current, a suitably insulated cable conductor electrically charged by said source of high tension alternating current, a series of metallic inductive electrical breeze-producing looped pins positioned and held upon said insulated cable, by means of a suitably interwoven strip of insulating material, a sheet of insulating material folded over and completely encasing saidlooped ins, and insu# lating andmounting means or the purpose of protecting and attaching the device to pa,- per handling machines.

Signed at the city of New York in the county of New York and State of New York this 21st day of November, A. D. 1930.

CHARLES HENRY COCHRANE. 

